Referensi:
Hanžl, Pavel & Verner, Krystof & Buriánek, David & Šíma, Jiří & Janderkova, Jana & Paleček, Martin & Hroch, Tomáš & Martínek, Karel & Megerssa, Leta & Hrdličková, Kristýna & Metelka, Vaclav. (2019). Basic principles of geological and thematic mapping. 10.13140/RG.2.2.12898.99523.
https://www.mindat.org/min-48512.html
https://www.mindat.org/min-48540.html
https://www.alexstrekeisen.it/english/vulc/trachyte.php
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